In hydrogen atom, electron makes transition from n=4 to n=1 level. Recoil momentum of the H atom will be electron makes transition from n=4 to n=1 level. Recoil momentum of the H atom will be In hydrogen atom June 9, 2021 Category: Cengage NEET by C.P Singh , Chapter 15 - Properties of Matter , Facebook Messenger WhatsApp Share this:TwitterFacebook Related